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Post #2859
4.09K
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- ❤ 3
- 👍 3
Channel Public Channel
JA JavaScript
@javascript
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Showing posts older than #2860 · Back to latest
Older Posts 20 shown
Post #2858
4.02K
CHALLENGE
const x = null;
const y = undefined;
const z = 0;
const result1 = x ?? 'default';
const result2 = y ?? 'default';
const result3 = z ?? 'default';
const combined = result1 ? result2 ? result3 : 'B' : 'C';
console.log(combined);
- ❤ 3
- 🔥 2
- 👍 1
Post #2857
4.17K
🤔 Open Sourcing the Remix Store
The Remix Store is a swag store for the Remix project and its codebase provides a powerful example of how Remix’s own core team builds apps with Remix and Hydrogen.
Brooks Lybrand and the Remix Team
The Remix Store is a swag store for the Remix project and its codebase provides a powerful example of how Remix’s own core team builds apps with Remix and Hydrogen.
Brooks Lybrand and the Remix Team
- ❤ 6
- 👍 2
- 🔥 2
Post #2856
4.1K
- ❤ 1
Post #2855
4.02K
CHALLENGE
function Vehicle(type) {
this.type = type;
}
Vehicle.prototype.wheels = 4;
Vehicle.prototype.getInfo = function() {
return `${this.type}: ${this.wheels}`;
};
const car = new Vehicle('Car');
const bike = Object.create(car);
bike.type = 'Bike';
bike.wheels = 2;
console.log(car.getInfo() + ' | ' + bike.getInfo());- ❤ 10
Post #2853
4.11K
👀 Useful Patterns for Building HTML Tools
In many situations, you don’t need a full-on framework to build useful tools; just HTML, JavaScript and CSS in a single file will do the job fine. Simon’s become a bit of an expert by rolling out many such tools using LLMs, and shares his process and practices here. More please!
Simon Willison
In many situations, you don’t need a full-on framework to build useful tools; just HTML, JavaScript and CSS in a single file will do the job fine. Simon’s become a bit of an expert by rolling out many such tools using LLMs, and shares his process and practices here. More please!
Simon Willison
- ❤ 8
- 👍 3
Post #2852
3.97K
- 👍 6
- ❤ 2
Post #2851
4.05K
CHALLENGE
const obj = { a: 1, b: 2, c: 3 };
Object.defineProperty(obj, 'd', {
value: 4,
enumerable: false
});
const entries = Object.entries(obj);
const keys = Object.keys(obj);
const values = Object.values(obj);
console.log(entries.length + keys.length + values.length);- ❤ 9
- 🤩 2
- 👍 1
Post #2850
4.14K
👀 Many Devs blame Vercel for Next.js-related React security vulnerabilities.
Because making new frameworks like Next.js is relatively easy nowadays, someone with enough social influence can literally destroy Vercel's business by popularising some other framework, which, by the way, would have nearly identical problems anyway, because this was mostly the React problem itself.
Tigran Bayburtsyan
Because making new frameworks like Next.js is relatively easy nowadays, someone with enough social influence can literally destroy Vercel's business by popularising some other framework, which, by the way, would have nearly identical problems anyway, because this was mostly the React problem itself.
Tigran Bayburtsyan
- ❤ 7
- 🤔 2
Post #2849
3.75K
- 👍 5
- ❤ 3
- 🤩 1
Post #2848
3.8K
CHALLENGE
class Subject {
constructor() {
this.observers = [];
}
attach(observer) {
this.observers.push(observer);
}
notify(data) {
this.observers.forEach(obs => obs.update(data));
}
}
const subject = new Subject();
subject.attach({ update: (d) => console.log(d * 2) });
subject.attach({ update: (d) => console.log(d + 5) });
subject.notify(10);- ❤ 3
Post #2847
3.97K
⚠️ 🔵 Denial of Service and Source Code Exposure in React Server Components
Security researchers have found and disclosed two additional vulnerabilities in React Server Components while attempting to exploit the patches in last week’s critical vulnerability.
If you already updated for the Critical Security Vulnerability last week, you will need to update again.
If you updated to 19.0.2, 19.1.3, and 19.2.2, these are incomplete and you will need to update again.
December 11, 2025 by The React Team
Security researchers have found and disclosed two additional vulnerabilities in React Server Components while attempting to exploit the patches in last week’s critical vulnerability.
If you already updated for the Critical Security Vulnerability last week, you will need to update again.
If you updated to 19.0.2, 19.1.3, and 19.2.2, these are incomplete and you will need to update again.
December 11, 2025 by The React Team
- 👍 5
- ❤ 2
- 🤔 2
Post #2846
3.44K
- ❤ 7
- 👍 4
Post #2845
3.65K
CHALLENGE
const a = { x: 1 };
const b = a;
const c = { x: 1 };
b.x = 2;
const d = b;
d.x = 3;
console.log(a.x);
console.log(b.x);
console.log(c.x);
console.log(a === b);
console.log(a === c);- ❤ 4
Post #2844
3.89K
- 👍 5
- ❤ 2
Post #2843
3.74K
CHALLENGE
const curry = (fn) => {
return function curried(...args) {
if (args.length >= fn.length) {
return fn.apply(this, args);
}
return (...nextArgs) => curried(...args, ...nextArgs);
};
};
const multiply = (a, b, c) => a * b * c;
const curriedMultiply = curry(multiply);
const step1 = curriedMultiply(2);
const step2 = step1(3);
const result = step2(4);
console.log(result);- ❤ 1
- 👍 1
Post #2842
3.97K
- ❤ 10
- 👍 2
Post #2841
4.15K
CHALLENGE
const x = 5;
const y = 10;
const obj = {
x,
y,
z: x + y,
calculate() {
return this.x * this.y;
},
[x + y]: 'computed'
};
console.log(obj.calculate() + obj[15] + obj.z);
- ❤ 4
- 👍 1
Post #2840
3.59K
- ❤ 5
- 👍 3
- 🤔 3
- 🤩 3
Post #2839
3.75K
CHALLENGE
const promise1 = Promise.resolve(10);
const promise2 = promise1.then(x => x * 2);
const promise3 = promise2.then(x => {
console.log(x);
return x + 5;
});
const promise4 = promise2.then(x => {
console.log(x);
return x * 3;
});
Promise.all([promise3, promise4]).then(results => {
console.log(results);
});
- ❤ 3
- 👍 1